Combined rotary drilling nut and slips.



E. DOUBLE. COMBINED ROTARY DRILLING NUT AND SLIPS.

APPLICATION FILED JUNE 8. I9I4.

Patented June 15, 1915.

To all 'wko/mit may concern:

Be it known that I, EDWARD a citizen of 'the United States, residing atLos Angeles, in the county of Los Angeles and State of California,'haveinvented a new and useful yCombined Rotary Brilling Nut and Slips, ofwhich the followingis a specification.

This invention relates to a combined drilling nut -and slips for rotarydrilling.

Heretofore, so far as I am aware, in r0- tary drilling, the respectiveoperations of rotating the stem anddrill and of suspending the string,have been accomplished by two dierent instrumentalities, a nut beingemployed for rotating the stem, and separate slips being employed forsuspending the string. When rotating the stem, the nut has been placedin operative relation between the table and stem to impart rotation fromthe table to the stem. lin suspending the string the slips have beenplaced in substitution for thenut in o erativ'e relation between thetable and. 'ng to suspend the string. rIhus, for two differentoperations, these two separate instrumentalities have been usedinterchangeably and either one in substitution for the other, accordingto theoperations to be performed. Where two separate 'instrumentalitiare employed in such manner, it has been customary tp lift the nut outof engagement with the table by means of. the coupling in the stringimmediately below the nut which formsan enlargement adapted for 'thepurpose. When the' nut was thus lifted outof place in the table theslips were inse i in lieu thereof. When Ithe' nutA was usedv inengagement with the table, the slips had to be removed and laid at oneside.

With my inventionthe disadvantages of having two separateinstrumentalities are avoided 4and a single element is provided thatisso constructed that, when pla in one 'position with respect to the steinand the table, it actsas a nut to revolve th'e'stem, and, when placed inanother position. between th'e string and the. table it acts as slips toengage the' drill pipe and mend t string.

ln carrying ont my invention, I employ a member'whicli on one sideisformed to en gage the string as a slip, and itsothersldfe is formed toengage the drilling stein to produce rotation thereof, and either sideis adapted to co-act with the vtable while the geniessen if ses @anni.Ententes Func t5, 19m entienden tiled un'e a, 181e.

i No. M8107.

act' with the drilling stem arev se constructed aS t0. also co-act withthe table when the members are employed as slips te suppsrt the string.v

rEhe members are reversible with respect to each other so that theirslip surfaces may be arranged toward each other for gripping andsuspending the string, o r their nut surfaces may he placed toward eachother in position tpr engaging, the drilling stem.

Referring to the drawings, Figure l is a side elevation of' the upperpant of the rotary stem, showing the. table in cross section. with thedevice operating as a, nut. Fig. 2 1s a. View,y similar to Fig. li,Showing the device acting as slips. Eig. Sais a plan view ofthe table asarranged in Fig. 1. Fig. 4 is a view, similar teilig. 3, showing thetable as arranged-in Fig. 2. Fig'. 5 is a persDective view of a member,looking toward thenut side. Fig. Gvis a perspective view of a member,lookingl toward the slip side. Fig. 7V is a perspective view off one of.the members ofthe split bushing.

1 designates the drilling-stem which has one or more faces adapted toco-act with the nut to be 'described for producing the rotative movementof the and the-string, the stem preferably.A being squarein crosssection.

2 designates the lower portion of the string consisting ofthe usualdrillingpipe which is connected with the drilling stem 1 by e couplingt3.-

4. designates he rotary table, operated in well=known manner by bevelgear 5 and bevell pinion 6.' The tablev 4 is recessed at the center toreceive a split bushing, consisting of two members 7. which are providedwith shoulders 8- which take against similar vshoulders. 9 on the table.and the outer portions ofthe, members 7 below the shoulders B are.round, while above the shoulders 8 they are square, that is tov say, thetwo u rstogether form a Square, as clearly Ashown in Figs. 3-and 4..Each of the members 7 is also provided with4 a vertical notch 10, thebackl wall 11 of which is I preferably employ two such s inclined,V`andwi-th an inner flange 12; handholds 13 are preferably provided on theand withdrawn. Each of the members isv alsoprovided with a rabbet 14, sothat when be used as slips, they are lifted out, reversed,

the two members are in position a slot 15 is provided on opposite sides,which enables the passage of a fish tail bit without withdrawing thesplit bushing. The combined nut and slips, as herein shown, are formedof two segmental members 16, each having a longitudinal groove 17, thebottom of which is parallel with the face in which it is formed. On theother side the member is formed with a concave groove 18, which isprovided with transverse ribs or teeth 19, the groove and face in whichit is formed being at an angle to the opposite face. For convenience ofdescription I will refer to the inclined face having the teeth as theslip face, and the other face as the nut -face. Either member is alsopreferably provided with suitable handholds 20 for withdrawing it. Onlthe nut facelthe wall on either side of the groove 17 forms flanges 21,and on the slip face flanges 22 are formed.

When the members are to be used as a nut, as in Fig. 1, .they areinserted in the split bushing, with the flanges 21 touching each other,and the anges 22 in contact with the inclined back wall 11 of theassociated member of the split bushing. When thus in position, the'twogrooves 17 form a nut, square in cross section, as clearly shown in Fig.3, which nut engages the drilling stem 1 and acts to revolve the same asthey table revolves. When the members are to and reinserted, as shown inFig. 2, with the flanges 21 resting against the walls of the splitbushing, and the teeth 19 of the-slip faces bearing against the drillingpipe 2 and biting the same in such a`manner ast support the string. Thegripping effect o the teeth 19 is produced by weight of the strin actingdownwardly on the wed eshape members and forcin their teeth rmly intothe drilling pipe. en the members are in` use as slips, with their teeth19 in contact with the drilling pip, the teeth.of both members areparallel. When the members are used asnuts, thefiange 12 forms apositive support for the members, preventing them from dropping throughor from wedging the string.

What I claim is:

1. In combination with a rotary string, a rotary table, a plurality ofmembers rotated by the table, each of said members being provided withmeans on one surface for holding. the strin against longitudinalmovement, and wit means on another surface for 1mparting rotation to thestring vwhen the table is rotated.

l2. In combination with a rotating table and string, a plurality ofmembers rotated by the table, each of said members having a vmembers,each of said members being provided with means for supporting the stringagainst longitudinal movement, and with means for rotating the string,said table Y having inclined supporting means for sup porting said wed eshaped members.

5. In combinatlon with a rotating table and string,`members reversiblymounted on the table, and each provided with a face 1 having a series ofteeth for gripping -the string to suspend the string and provided withanother face having a fiat surface for engaging the attened surface ofthe stem of the string for rotating the string.

6. In combination with a rotating table and string, a plurality ofmembers reversibly mounted on the table, each of said members providedwith a concave surface having a series of transverse corrugations fromthe teeth adapted to engage and suspend the string, each of said membershaving a longitudinal groove formed in the oppositeface adapted when themember is reversed to engage the stem of the string -to rotate the same.

7. In combination with a rotating table and string, a bushing in the,table ormed with a tapering inner wall, and members reversibly mountedin said bushing and fitting between said wall and string and eachprovided on `one face' with means for'supporting the string and onanother face with means for rotatingthe string.

8. In combination with a rotary table and string, a split bushing in thetable, the members of the bushin having. inclined inner walls, aplurality o wedge shaped members fitting against the inclined innerwalls of the bushing and against the string, each of said members havinga face with teeth for 'ping the string to suspend the same and avmganother face with a attened surface to engage the stem of the string torotate the same.

9. In combination with a rotary table and string, a split bushing in thetable, the members of the bushin having inclined inner walls, aplurality o wed e shaped members fitting against the incline inner wallsof the bushing and against the string, each of said members having aface With teeth for gripping the string to suspend the same and havinganother face with a attened surface to engage the stem of the string torotate the same, the rst mentioned face of each member having 'angesadapted to rest against the inclined face of the bushing when theopposite face is in engagement With the stem, and the second mentionedface of the member being provided-with flanges adapted to rest againstthe inclined face o the bushing when the opposite face is engaging thestring to suspend the same.

l0. In combination With a rotary table and string, a split bushing inthe table, the members of the bushing having inclined inner Wails, aplurality of Wedge shaped members fitting against the inclined innerWalls of the bushing and against the string, each of said members havinga face with teeth for gripping the string to suspend the saine andhaving another face with a iattened surface to engage the stem of thestring to rotate the same, said bushing having an inward flange forsupporting said members when Vthey are engaging the stem to rotate thestring.

11. In combination with a rotary table and `theinclined Aface of thebushing when the opposite face is in engagement With the stein, and thesecond mentioned face of the member being provided With flanges adaptedtq rest against the inclined face of the bushing when the opposite faceis engaging the string to suspend the same, said bushing havinglongitudinal slots to permit the passage of a fish-tail bit.

In testimony whereof I have hereunto set my hand at Los Angeles,California, this day of May 1914.

EDWARD DOUBLE.

In presence of- FREDERICK S. LYON, LORRAINE E. DUnRAN.

